/*
 * Copyright 2014-2022 Netflix, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.netflix.spectator.api;

class DistSummaryBatchUpdater implements DistributionSummary.BatchUpdater {

  private final DistributionSummary distSummary;
  private final int batchSize;

  private int count;
  private final long[] amounts;

  DistSummaryBatchUpdater(DistributionSummary distSummary, int batchSize) {
    this.distSummary = distSummary;
    this.batchSize = batchSize;
    this.count = 0;
    this.amounts = new long[batchSize];
  }

  @Override
  public void record(long amount) {
    if (amount >= 0) {
      amounts[count++] = amount;
      if (count >= batchSize) {
        flush();
      }
    }
  }

  @Override
  public void flush() {
    distSummary.record(amounts, count);
    count = 0;
  }

  @Override
  public void close() throws Exception {
    flush();
  }
}
